Yrs of Exp - 4 to 10 Yrs

Location - Gurugram

Immediate Joiner to 15 Days Notice Period Preferred

Roles & Responsibilities

We are looking for a FreeSWITCH Implementation Engineer who will be responsible for designing, deploying, configuring, integrating, and maintaining FreeSWITCH-based

VoIP platforms. The role involves working closely with SIP, RTP, WebRTC, IVR,

conferencing, call routing, and external integrations in a production environment.

� Key Responsibilities

�FreeSWITCH Core Responsibilities

 Install, configure, and maintain FreeSWITCH in production environments from the scratch.

 Design and implement call flows, dialplans, IVRs, conferencing, and call routing with complete ownership.

 Configure SIP profiles (internal/external), gateways, trunks, and extensions

 Implement multi-tenant and high-availability FreeSWITCH architectures

� SIP, RTP & Networking

 Robust understanding of SIP signaling, RTP media, and SDP negotiation

 Troubleshoot one-way audio, no-audio, call drops, registration failures

 Configure NAT traversal, firewall rules, and RTP port ranges

 Analyze SIP logs and traces (siptrace, sngrep, tcpdump)

� Dialplan & Scripting





 Develop dialplans using:

o XML o Lua / JavaScript / Python

 Implement logic for:

o Call queues for inbound and outbound calls o Time-based routing o Skill-based routing o Failover and fallback handling

� Integrations & APIs

 Integrate FreeSWITCH with:

o CRM / ERP systems o Billing platforms o AI voice bots (ASR/TTS)

o External WebSocket or REST services

 Use Event Socket Library (ESL):

o Inbound & Outbound ESL o Real-time call control and monitoring

� WebRTC & Media

 Configure WebRTC support (DTLS-SRTP, ICE, OPUS)

 Work with mod_verto, SIP over WSS

 Implement browser-based calling solutions

� Monitoring & Debugging

 Monitor system performance and call quality

 Analyze logs and CDRs

 Optimize codec usage and RTP performance

 Handle live production incidents and RCA

� Deployment & Operations

 Deploy FreeSWITCH on:

o Linux (CentOS / Ubuntu)

o Cloud platforms (AWS / GCP / Azure – preferred)

 Configure HA, load balancing, and scaling

 Work with DevOps teams for CI/CD, backups, and automation

📌 Telephony Engineer (FreeSWITCH, VoIP) (Gurugram)
🏢 PeriodBuddy
📍 Gurugram